六氟丙酮及其应用

介绍了六氟丙酮的主要特性 ,用途及合成方法     

含稀土配合物的甲基丙烯酸甲酯荧光性能研究

含稀土有机配合物的高分子材料综合了稀土材料和高分子材料的优异性能,在制备光学器件方面有广泛的应用前景.本文制备了含铕的噻吩甲酰三氟丙酮(TTA)和二苯甲酰甲烷(DBM)配合物的聚甲基丙烯酸甲酯(PMMA)体系,并考察了配合物含量、配体、小分子掺杂剂和PMMA分子量对体系荧光性能的影响.分析表明要想获得高效发光的稀土配合物高分子体系需要选用对称性较差,含氟取代基较多的配体,并找到合适的配体或小分子掺杂剂的含量,且尽量增大基体的分子量.     

含三氟甲基聚酰亚胺的研究进展

三氟甲基聚酰亚胺是目前研究得较为广泛的一类功能材料,综述了含三氟甲基聚酰亚胺的研究进展,从含不同基团的三氟甲基结构(3F,6F,9F)出发,介绍了这3类基团的结构和特点,归纳了一些新型含三氟甲基二胺单体和二酐单体的结构与合成,主要介绍近年来国内外在含三氟甲基聚酰亚胺的性能研究及应用领域中的最新进展。     

稀土铕有机配合物的研究进展及其应用

目的 介绍稀土铕有机配合物的原理、分类、应用及其最新研究进展,为高性能稀土铕配合物的研发提供一定的思路和依据。方法 通过查阅国内外学者近年来对稀土铕有机配合物的各种研究文献,对稀土铕有机配合物的主配体种类及应用进行整理总结。结果 稀土铕有机配合物的主配体有四大类,即β-二酮类、羧酸及羧酸盐类、有机高分子类与超分子大环类,该配合物主要应用于荧光材料、发光材料、磁性材料和生物等四大领域。结论 铕有机配合物的荧光性能良好,且高分子类配合物易加工成型;有机高分子类铕配合物可以结合Eu3+和高分子的优点,在提高其与聚合物材料相容性的前提下,有望成为一种新型的功能材料。     

锂离子电池电解质六氟磷锂的制备技术

结合国内外对锂离子电池电解质六氟磷锂的研究,介绍了六氟磷锂4种制备方法的研究进展,即气-固反应法、HF溶剂法、配合物法和溶液法,并总结了各方法的优缺点,其中,配合物法和溶液法以其方便快捷等优点成为未来六氟磷锂制备技术的发展趋势。     

锂离子电池电解质六氟磷锂的制备技术

结合国内外对锂离子电池电解质六氟磷锂的研究,介绍了六氟磷锂4种制备方法的研究进展,即气-固反应法、HF溶剂法、配合物法和溶液法,并总结了各方法的优缺点,其中,配合物法和溶液法以其方便快捷等优点成为未来六氟磷锂制备技术的发展趋势。     

消息报道

上海三爱富公司剧毒废液清洁生产技术申请国家专利六氟丙烯生产过程中产生的全氟异丁烯(PFIB)是一种剧毒液体,通常只能焚烧处理。上海三爱富新材料有限公司经过多年自主研发、探索出“两步走”的变废为宝新工艺:第一步,用甲醇吸收全氟异丁烯,反应产生毒性较低的七氟异丁烯甲基醚;第二步,把七氟异丁烯甲基醚溶液经过脱水、精馏、提纯,再经过氧化生成六氟丙酮。六氟丙酮是含氟酮中最有价值的产品,其下游产品均为航天、医药、纺织、微电子等高科技领域急需,目前国内尚无六氟丙酮生产装置,国际市场价格约500元/kg。2004年底,上海三爱富新材料…     

锡氟磷酸盐玻璃/聚合物杂化材料结晶性能研究进展

综述了近年来锡氟磷酸盐玻璃/聚合物杂化材料的结晶性研究进展,分别介绍了锡氟磷酸盐玻璃对极性、非极性聚合物结晶性能的影响,并对锡氟磷酸盐玻璃/聚合物杂化材料的应用前景进行了总结与展望。     

一种新型铕三元配合物的制备与荧光性质研究

合成了1个邻菲罗啉衍生物DmPPhen,作为第二配体,以α-噻吩三氟甲酰丙酮作为第一配体制备了1种新颖的三元稀土铕(Eu)配合物发光材料。利用红外光谱、元素分析及核磁氢谱分析了配合物的组成与结构。在常温下研究了配合物的荧光性质,结果表明配合物有很好的荧光性质。     

氧化锌掺杂铝纳米片的制备及其气敏性能研究

采用水热法,以油酸为形貌控制剂,硝酸铝为铝源,制备了氧化锌掺杂铝纳米片,对其进行了XRD、SEM和EDS表征。考察了制备物对甲醇、乙醇、丙酮、异丙醇、正丁醇、DMF等六种气体的气敏性能,并对其气敏机理进行了简要分析。结果表明,掺杂3%Al的ZnO样品晶粒尺寸变小,为带微孔的层状纳米片,EDS能谱表明样品含有Zn、O和Al元素。样品对正丁醇、丙酮的灵敏度较高,100ppm时分别为164和70,对丙酮的响应和恢复时间分别为7s和29s。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to